The two woofers are not operating over the same range, eliminating my interference concerns. One operates from 700 Hz to 100 Hz, while the second operates from 100 Hz to 30 Hz. Both have 25 mm linear peak to peak excursion max, so there is going to be pretty good dynamic range.
The "midrange" horn and 476Be compression driver actually cover an extreme range of 700 Hz to 20 kHz, above which they cross over to a horn-loaded Be supertweeter.
This is actually a more compact and much more visually appealing speaker than the DD55000. The Danish cabinetry looks superb and the veneer is grain-matched front-to-side-to-top. Congrats to JBL on their new flagship.